should fix issues with layer control on mobile, and other improvements
also - the convention for marker filenames has changed from ...@2x.png to ...-2x.png for the double sized ones - so changed our files to match (we had a mix of ...@2x.png and ..._2x.png)
- plugins are now parsed for @@..@@ replacements
- main script and plugins have separate .meta.js files created - less web server load for update checks
- build script has variables for resource URL, update URL, etc, substituted via @@..@@ into main script and all plugins
loading dependencies just got a lot harder. External JS and CSS files
are now included directly in the file while building. This does not yet
work for plugins. I will make an emergency release soon, so at least
main works.
